invert key with value and test

Author: nahommesfin77

Sprint-2/interpret/invert.js

@@ -10,20 +10,34 @@ function invert(obj) {
   const invertedObj = {};
 
   for (const [key, value] of Object.entries(obj)) {
-    invertedObj.key = value;
+    invertedObj[value] = key;
   }
 
   return invertedObj;
 }
 
 // a) What is the current return value when invert is called with { a : 1 }
-
+//{ key: 1 }
 // b) What is the current return value when invert is called with { a: 1, b: 2 }
-
+//{ key: 2 }
 // c) What is the target return value when invert is called with {a : 1, b: 2}
+//{"1": "a", "2": "b"}
 
 // c) What does Object.entries return? Why is it needed in this program?
-
+// Object.entries gives an array of [key, value] pairs.
 // d) Explain why the current return value is different from the target output
-
+// invertedObj.key sets a property literally called "key". We need to use the variable key as the dynamic property name. and we need to change "key" to "value" and "value" to "key".
 // e) Fix the implementation of invert (and write tests to prove it's fixed!)
+console.assert(
+  JSON.stringify(invert({ a: 1, b: 2 })) === JSON.stringify({ "1": "a", "2": "b" }),
+  "multiple keys test failed"
+);
+console.assert(
+  JSON.stringify(invert({ x: "hello", y: "world" })) === JSON.stringify({ "hello": "x", "world": "y" }),
+  "string cases test failed"
+);
+console.assert(
+  JSON.stringify(invert({})) === JSON.stringify({}),
+  "empty test failed"
+);
+console.log("All tests passed!");